Pivotally supported tire bead forcing device



Jan. 1, 1952 g. E. EDENFIELD ETAL 2,581,086 PIVOTALLYMSUPPORTED TIRE BEAD FORCING Filed Sept. 7; 1948 3 JSheets-Sheet l Inventor.;

Attorney Jan. 1, 1952 E. E. EDENFIELD ETAL PIVOTALLY SUPPORTED TIRE BEAD FORO-ING DEVICE 3 Sheets-Sheet 2 Filed Sept. 7, 1948 Attorney Jan 1, 1952 E. E. EDENF'IELD `na-rm. 2,581,086 PIVOTALLY SUPPORTED TIRE BEAD FORCING D Filed Sept. '7, 1948 EVICE 51 sheets-sheet s Attorney Patented Jan. l, 1952 PIvoTALLr sUPPoRTED TIRE BEAD roRcING Eli E.. Edeniield, Lakeland, and Ernest M. Gabriel,

Jacksonville Beach, Fla. Y

Application September 7, 1948, Serial No, 48,076rv A Claims. (Cl. 1571.17)

This invention relates to a novel machine or implement of extremely simple construction and which readily adapts itself for use with a minimum of manual effort and labor'to the removing of pneumatic tires from tire rims of the continuous type which are ordinarily constructed as part of a vehicle wheel and which constitutes an improvement over our prior co-pending application entitled Pneumatic Tire Removing Tool led -December 19, 1947 and bearing Serial No. 792,662.

The present invention, like our prior application, provides amachine or implement especially intended for removing tires such as are employed on large trucks and which can not be feasibly removed with conventional tire tools but is also applicable for use on ot er types of vehicle tires including those employed with drop-center rims.

In addition to the objects and advantages set forth in our prior application, the present invention has for a primary object to provide an even simpler tire remover which can be applied to and removed from a rim with a minimum of manual labor and loss of time by the provision of a novel clamp structure which may' be readily engaged with a xed flange of a tire rim for'detachably securing the machine thereto and so that a movable element thereof mayl thereafter be readily projected for forcing the tire off of the side of the rim remote to the ange engaged by the clamp.

Still another object of the present invention is to provide a clamp having a relatively narrow claw which may be readily driven into a position between the side wall of a tire and stationaryrim iiang'e for clamping the machine thereto and so that'a relatively wide foot or presser member may thereafter be projected against said side wall of the tire for forcing `it away from the aforementioned ange.

Still another object of the invention is to provide a novel machine wherein the foot or presser member is swingably supportedV relatively te the lea points labout the cirtire to effect a con- DEVICEy siderable saving in time and labor in applying and removing the machine. i

Variousother objects and advantages of the invention will hereinafter become more fully lapparent' from the following description of the drawings, illustrating a preferred embodiment thereof, and wherein:

Figure 1 is a side elevational View, partly broken away and partly in section showing the machine in its initial applied position on a pneumatic tire rim;

Figure 2 is a View of the machine detached from the rim` looking from right to left of Figure 1;

Figure 3 is a fragmentary substantally central vertical sectional view of the machine showing the clamp thereof in a partially applied position;

Figure 4 is a bottom plan View of the machine detached from the rim and with the parts in the positions as shown in Figure 3;

Figure 5 is a fragmentary side elevational vie'w showing the presser element in a partially projected position;

Figure 6 is a view similar to Figure 5 and illustrating the next advanced position of the presser element; Figure 7 is a view similar to Figures 5 and 6 illustrating a further advanced position ofthe machine and wherein the rim is illustrated as of the drop-center type, and

Figure 8 is a horizontal sectional View taken substantially along a plane as indicated by the line 8-8 of Figure 5.

Referring more specifically to the drawings, the tire removing machine in its entirety is designated generally I 0 and includes an elongated tube or cylinder I I the upper end of which is open and internally threaded as seen at I2 to receive the externally threaded neck I3 ofa conventional, manually actuated hydraulic pump I4 the piston rod I5 of which extends reciprocally through a boss on the upper end of the pump cylinder I6 and which is pivotally connected to an intermediate portion of an actuating lever I1 which is fulcrumed at one of its ends by a link I8. which is pivotally connected thereto and to an upstanding extension I9 and the cylinder I6. The pump lever I1 is adapted to be manually oscillated in a conventional manner and to aiford additional leverage, a tubular handle 20 is providedgone end of which is adapted to detachably engage over the outer end of the lever I1. Said end of the handle 20 is provided with diametricallyl opposed outwardly opening notches 2| for a purpose hereinafterto-be described'. The hydraulic pump I4 is provided with the usual manually controlled release valve 22 to permit the hydraulic fluid to return to the cylinder I5, when opened. The parts I3 to 22, inclusive, constitute no part of the present invention and have been illustrated and described merely for the purpose of illustrating one means of actuating the machine I and as the description proceeds it will be readily apparent that the machine can be actuated by other means such as illustrated in our prior application.

The tube or cylinder i l is provided with an externally and internally thickened lower end 24 forming a restricted bore for guiding a piston rod 25 which extends reciprocally therethrough and which is provided on its upper end with a piston 21 having the usual sealing rings and against the upper end of which the pressure of the hydraulic medium, not shown, is exerted when the pump i4 is actuated for projecting said piston and the rod 25 downwardly. The internal part of the thickened portion 24 forms a stop for engagement with the lower end of the piston 21 to limit its downward movement toward a projected position and it will be readilyr apparent that with the valve 24a in an open position that the piston rod and piston can be forced inwardly or upwardly of the draulic medium back into the pump cylinder i6.

A presser element or foot 28'is secured to the lower, outer end of the piston rod 25 in any suitable manner as by means of a pin 25. The presser element 28 is disposed in a plane transverselyl to the axis of the piston rod 25 and includes a relatively long plate portion 30 having a shank portion 3i projecting transversely from one longitudinal edge thereof and in which'the end of the rod 25 is secured. The shank portion 3l is thickened in a direction perpendicular to the plane of the plate 30 and is provided with an enlarged outer end 32 forming an impact receiving surface, lfor a purpose which will hereinafter be described. The opposite, outer edge of the presser plate or foot 30 is longitudinally curved andV inwardly bowed as seen at 33 in Figure 4 and generally conforms to the curvature of a tire rim and is provided intermediate of its ends with a recess or notch 34.

The cylinder Ii at a point above the enlargement 24 is provided with an externally thickened integral portion 35 having on one side thereof a projection 35 which is provided at its ends with trunnions 31. i

A rim clamp, designated generally 38 includes a section 39 comprising an elongated bar 45 one end of which is curved and tapered to form a claw 4l and the opposite end of which is turned laterally in the same direction as the claw 4i to form a stop 42. From said last mentioned end of the bar 40 extends a pair of ears 43 which are disposed substantially parallel and which project from the side edges of the bar 40. The ears 43 are provided with openings 44 at their free ends for turnably engaging the trunnions 31 for swingably supporting the clamp 35 on the cylinder Il and as clearly illustrated in the drawings, said clamp normally depends downwardly with respect to said cylinder and to beyond the lower end thereof. The claw 4I on its outer side is recessed to provide an upwardly facing rounded shoulder 45. The recessed portion of the claw 4i is adapted to be initially disposed in the notch 34 of the presser plate 30 and with the inner portion of said notch resting on the shoulder 45, as best illustrated in Figure 3. The ears 4 3 may be cylinder il for forcing the hyltinuations of the ears 43.

formed integral with the bar 40 in which case one of said ears is bent inwardly to engage its trunnion 31 after the other ear has been placed in engagement therewith or one of the ears 43 may be welded to the bar 4B after the ears have been engaged with the trunnions.

The bar 45 is provided with flanges 45 which project therefrom in a direction away from the cylinder il and which are disposed substantially parallel and may constitute integral lower con- A lever 41 has its intermediate portion disposed between the outer extremities of the flanges 4S and is connected thereto by a pin 48 which extends through an opening 49 of the lever 41 and through the outer portions or the flanges 45 for swingably mounting said lever 41 on the clamp section 38. The lever 41 is provided with a bifurcated upper end 5l) to accommodate an internally threaded sleeve 5l having trunnions 52 for engaging aligned openings in the upper ends of the furcations for swingably supporting said sleeve 5| on the lever 41. A screw 53 extends threadedly through the sleeve 5i and with said sleeve and lever 41 form the other section of the clamp and which is designated generally 54. The screw 53 is provided with a restricted rounded end 55 for sliding vengagement with the inner surface of the bar 40 and spaced from its opposite end, said screw is provided with oppositely last mentioned end of the screw 53 is engaged by the end or" the handle 25, provided with the notches 2i which engage the pins 55- so that the handle 25 will function for turning the screw 53 in the sleeve 5i or for swinging the screw and sleeve relatively tothe lever 41, as will hereinafter become apparent.

The opposite end of the lever 41 isvprovided on its inner side with a notch 51 forming a shoulder or stop 58 which is adapted to bear on an internal portion of the flange of a tire rim and which notch 51 also forms a surface 59 which is disposed substantially at a right angle to the stop 58 which is adapted to bear on a portion of the inner side of the bed of a tire rim, as clearly illustrated in Figures 5, 6 and '7.

The clamp 38 is urged toward the lower end of the cylinder i I by a pair of contractile springs 50 having at corresponding ends thereof links 5i which engage shank portions of headed pins 52 which extend into projections 53 on the enlargement 24, as best illustrated in Figure 4. The ends of the pin 48 project outwardly from the flanges 45 and are each engaged by a loop 54, which loops are each fastened to the opposite end of one of the springs 50 and it will be readily apparent that the springs 50 will normally retain the notch 34 in engagement on the rounded shoulder 45 of the claw 4l until the piston 21 and piston rod 25 are projected outwardly.

For the purpose of illustrating one preferred application and use of the machine Hl, in Figures l, 3. 5, 6 and 8 a portion of a conventional type continuous truck tire rim is illustrated at- 65 and which is shown provided with a conventional tire 55, omitted. The rim 55 is provided with the usual rigid flange 51 at one side edge -thereof and its opposite side edge is provided with a removable ange 58 which is held in an applied position by a split spring ring 59 in a conventional manner. Y

To employ the machine I0 for removing the tire 55 from the rim 55, the split ring 53 is inltially removed so that theremovable vflange 58 projecting pins 55. Saidv the innerv tube of which has beenassunse lcan be :ldetachedror willfreadily slide :foil of the rimfwithithe'tiree. Withthe Apresserelement t8'.-1e'ngaging:on theshoulder F45, as .illustrated 'rin Figure 53 and with l'thellever i411'inrra `retractedipo- \sition,'.lth`e= claw 'lI-I- zwhich :is "rlativelymarrv, as seen-in. 'Figure A'4,fris inserted between'2th'e ilange v6.1fandtlieiadjacentiv sidevwall 'of' the tireiI 661 after which the impact surface 32 is'struckfwithf-fan impa'cttool, such as :ahammenlnot shown-'for drivingltheuclaw '41 into the position aslseenin Fig-ure 3 Land :which 1 canv be `.readily accomplished due to ltheizfactthat`A the claw T4 l is relatively narrow and is Cth'ereforerequired to 'breakeonlyfa 'smallf part of thevtire wall-awaylfromtheiflange 61. l'llherside of'the rim-65 engaged by'thetire ffw'ill'be describedfas 'the 'outer'iside thereof. Accordingly, after thelcla-w 4'I"'hasassumedits quired -to' rock-the. screw 53 counterclock-wise to cause it to slide downwardly on the bar 4I). The screw 53 is tightened so that it will hold the lever 41 in `the position of Figure 1 and with the shoulder 58 engaging a portion of the inner side of the ange 61 and with the surface 59 engagf lng a portion of the inner side of the bed of the rim 65. The notch 51 is made sufficiently deep to t the aforementioned portions of rims of different shapes and in the manner as illustrated in the drawings. With the lever 41 thus disposed as illustrated in Figure 1, it will be readily apparent that the clamp 38 is anchored to the rim flange 61 for supporting the machine I0 thereon and the screw 53 when properly adjusted may be swung counterclockwise from its position of Figure 1 back to its position of Figure 3 for releasing the clamp and so that the machine may be quickly and easily engaged with another portion of the rim flange 61 without readjusting the screw 53.

After the machine l!) has been clamped to the rim flange as illustrated in Figure l., the handle is employed for operating the pump I4 so that the fluid therefrom will be forced into the upper end of the cylinder I I for projecting the piston 21 and .piston rod 26. Upon the initial downward movement of the piston rod 265, the inner portion of the notch 34 will ride downwardly and outwardly over the shoulder after which the underside of the presser plate 35 will move into engagement with the side wall of the tire 66, engaged by said flange 61, as illustrated in Figure 5. After the presser member 28 has been advanced slightly beyond its position of Figure 5 so that it has forced a substantial portion of the tire side wall away from the ange 61, the surface 32 is again struck with a hammer or other impact tool to drive the presser element 28 in- Wardly of the rim 65 and into its position of Figure 6, in which position it will be retained by the springs 60. The hydraulic pump I 4 is again actuated to move the presser element 28 from its position of Figure 6 in a downward direction until it has forced the portion of the tire 66 engaged thereby off of the rim 65 or substantially off of said rim. The clamp 38 is then released,

-'asfpreviouslydescribed `and :the machineiremoved f'fronr` the trim L65 fafter iwhich vv"the 'valve24ais opened so that the presserfelementcanxbe'returned to its position vof AFigureafter iwhich lthe clampis applied, as previously described,tto another por-tionlof `the? flangef6'1 and 'the operation repeated vThis operationis performedat'fa s'u'icient number of circumferentially :spaced points around the rim forbreaking thetireaGB `loose i from the n'm and for removing .thetire 'frmisaidrim. Actually, as thetirea'ncl rim are lai'don'thewground or 'other supportingrsurface usuall-yfor' removing the tire,Y in reality the machine I functions to withdraw the rim 65 `up- `rwardl-yf'an'dout of engagementr withfthe tire since ytheit'ireis'resting o'n 1a supporting surface.L

'lThemachine` Iii is also adapted forn use 'the sameY manner "for breakingthe tire walls-away vfrom the flanges 61a f of a drop-center type vrim 65d as illustrated in .Figure '1 rand 'which is providedatboth sides thereof -withistationary 'flanges ma. When employed Jin the same manner for this/purpose,A as thebead offthe side fwall which is'engaged by theupresser elementlZBmoves into thewdropecenter portion ofthe rimlit will have a'tendency tomove inwardly yinto said recessed intermediate portionv of fthe rim thereby."A tending to break vother portions of the'sidewall 'away fro'mthefrimflangev 61u" which-is engaged' by the clamp'BS. This operation? may be `repeated. several times around leach" ilange 61a duntil-'both side walls of the tire 66 have been disengaged from all portions of the ilange 61a after which the tire 65 can be readily removed with conventional tire tools from the rim 65a and with much less difficulty than is ordinarily required.

Obviously, the piston 21 could be dispensed with and in lieu of the hydraulic pump I4 any suitable mechanical pushing means could be utilized such as a Dawl and ratchet type jack as illustrated in our co-pending application or pneumatic or other means could be utilized with the piston 21 as it is immaterial to the invention involved how the rod 26 is projected from the cylinder or guide tube I I.

Various modifications and changes are contemplated and may obviously be resorted to, without departing from the spirit or scope of the invention as hereinafter dened by the appended claims.

We claim as our invention:

1. A machine for forcibly removing a pneumatic tire from its rim comprising a tubular guide, a rod reciprocally disposed therein, a presser element ixed to one end of said rod and disposed beyond an end of the tubular guide, a clamp swingably supported on said tubular guide for sai-d tubular guide being swingableinwardly of the clamp for moving said presser element inwardly and toward the rim and beyond said claw, and said presser element being movable with said rod when advanced toward a projected position,

relatively to the tubular guide, for forcing vthe tire off of the side of the rim remote to the flange engaged by said clamp.

2. A tire removing machine as in claim 1, said claw having a rounded shoulder on its outer side over which an edge of said presser element is movable when advanced toward a. projected position, and spring means for urging the tubular guide toward the clamp.

3. A machine as in claim 1, and cam means for swinging said movable clamp element toward an operative, rim engaging position and for retaining said element releasably inV an operative position.

4'. A machine for forcibly removing a tire from its rim comprising a rim flange engaging clamp having a claw adapted to engage between a rim ange and the adjacent side wall of a tire, a swingably mounted element forming a part of said clamp having an outer end adapted to engage the opposite, inner side of the rim ange and rim bed, adjustable cam means for rocking said swingable clamp element toward an operative position `and for retaining said aforementioned end thereof in engagement with the rim, a guide tube swingably connected to an end of the clamp remote to said claw, a rod reciprocally disposed in said guide tube and having one end projecting from an end thereof and disposed adjacent the claw, a foot member mounted on said end of the rod for engaging the side wall of the tire engaged by said flange when the rod is projected outwardly of the guide tube, means for projecting said rod relatively to the guide tube, and said foot member being disposed to ride over a portion oi' said claw and being displaceable inwardly and toward the rim when disposed therebeyond by swinging said guide tube in one direction on the clamp.

5. A tire removing machine as in claim 4, said cam means including an internally threaded sleeve swingably supported on the opposite inner end of said swinging clamp element, a screw Yextending adjustably through said sleeve and having one end engaging a surface of the clamp when said sleeve is rocked in one direction for causing said swingable clamp element to be swung toward an operative position.

ELI E. EDENFIELD. l ERNEST M. GABRIEL.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS 

